Machine for making millboard.



PATENTED OCT. 23, 1906.

2 SHEETS-SHEET 1.

W SILLMAN MAGHINE FOR MAKING MILLBOARD. APPLICATION IILEI) mm: 11. 1906.

Suva/whom r drfoul l vvbmeaac PATENTEDUCT. 23, 1906.

W. SILLMAN'.

MACHINE FOR MAKING IMILLBOARD.

AIPLIOATIOH FILED JUNE 11- 1906- 2 SHEETS-SHEET 2.

T'UNITED STATES PATENT OFFICE.

WILLIAM SILLMAN, or NEW YORK; N. Y.

MACHINE FOR NIAKING MIL LBOARD.

To all 1071/0111, it may concern:

Be it known that 1, WILLIAM SILLMAN, a citizen of the United States of America, and a resident of the borough of Brooklyn, county of Kings, city and State of New York, have lnvented certain new and useful Improve- -ments in Machines for Making Millboard, of

which the followin is a specification.

My invention rel ates generally to the manufacture of plates, sheets, or boards out of pulp-like mixtures, and more specifically consists of improved mechanism for econom- When a material which is finely pulverized, .such as hydraulic cement, and which has considerable specific gravity is employed in large quantity in such manufacture, the same is wasted in lar e part by being drawn through the meshes of the wire cloth-covered roll upon which the pulp material is originallydeposited by'the action of suction and so carriedjaway and also b being deposited in the bottom of the tank 0 the wet machine by virtue of its greater specific gravity. My

- invention overcomes this feature of waste by practically compelling all of the heavier and vention is illustrated in .the accompanying i tail of thesieve-shaking apparatus.

uresindicate like parts.

finellyi -divided constituent to enter into the finis ed product, prevents any premature setting of the cement, and has other advan-' tagesand economies. I

One form of apparatus embodying my'intwo sheets of drawings, in which Figures 1, 1 are a side elevation andpartial section of the machine, and Fig. 2 is a de-' Throughout the drawings ke reference-fig- ,1- 1 represent parts 'of'the main frame of the machine, and 2 is an endless band of felt runnin' over aseries of guide-rollers?) 3,-&c. 17

is a eater for cleaning said felt; 4, an adjust- -1ng-roll for guiding the felt in r0 er relation to the beater, the position 9 w 'ch is controlled by the adjusting-lever 18.

Specification of Letters Patent. Application filed 11111011, 1 06. Serial No. 321.112.

rolls, as shown.

Patented Oct. 23, 1906.

venient form, over which the felt 2 passes. The suction may be produced by steam jets, blowers, or many convenient manner. (Not here illustrated.) The felt 2 is properly guided with reference to these suction-boxes by the adjustable roll 5, the position of 23 23, &c., are suction-boxes of any conwhich is controlled by the screw 21, operated by the handewheel shaft 22.

6 is a tightening-roll for the endless band of felt, the position of which is controlled by the screw 19 and the hand-wheel 2Q.

7 is a lower press-roll mounted in stationary journal-bearings 8, and 9 the upper press-roll, mounted in movable journal-bearings 10, carried by the lever 13, pivoted to the main frame at 14 and pulled downward by the link 15', which is connected to 'the weighted pressure-lever 16. i

11 is a screw for limiting the downward motion of the upper press-roll 9 by means of the adjustable hand-wheel nut 12. The endless felt of course passes between thepress- 37 is the lower drying-roll for the feltmounted in stationary journal-bearings 38, and 39 is the upper d ng-roll, mounted in journal-bearings 40 in t e lever 42, pivoted to themain frame at 43 and pressed downward by the adjustable weight 44.- e Before entering these drying rolls the felt is further cleansed by the water-spray 59.

24 is a mixing-box to which one portion of the stock or material, such as asbestos fiber, beaten up with a suflicient quantity of water, is delivered through the stock-pipe 25.

26 is a water-pipe through which a suitable quantity of wateris delivered.

46 is a passage leading from the mixingbox to the distributing-trough 47. This passage is controlled by a gate 48. The trough 47 has a curvedbottom, as shown in crosssection.

27 is an agitator of any-convenient form,

Tlocated'in the distributing-trough. The side of the distributing-trough which is next the 'agitator has a horizontal delivery-slot 28 formed therein at a height approximately. corresponding to the axis of the agitator 27.

29 is an adjustable gate for said slot.

v 30 is an inclined apron of oil-cloth or similar material extending from the edge of their, distributing-trough below the slot 28. downv to a oint over the upper strand of the endless elt 2. This'apronhas upturned sides,

one of which is shown at 31.

ential travel on its under side opposite to the travel of the felt at thepoint of contact therewith or opposite to the direction of flow of the material down the apron 30.

35 is an overflow-pipe from the mixingtank, and 36 a partition which permits any excess of material to flow over into the compartment 45, which serves as an overflowbox and which is drained by the overflowpipe 35.

49 is a stock-chest from which the fiber pulp is drawn by any suitable means, as the pump 50, through pipe 51 and delivered to stock-pipe 25. The overflow-pipe 35 return the surplus pulp to this stock-chest.

52 is a sieve of any preferred construction containing dry finely-pulverized cement. A

suitable shaking or iggrng motion is given to this sieve by any convement mechanism, such as the crank 53 on the shaft 54, which is rotated by bevel-gearing 55 from the pulleyshaft 56, driven by a belt 57, deriving its motion from any convenient portion of the driving mechanism. (Not shown.)

The operation of my invention is as follows: The guide-roller system and the endless band of felt 2 carried thereby being set in motion by means of power (not shown) and the supply of pulp stock and water being turned on to the mixing-bo'x, the same will overflow through the slot 28 in an even stream down the inclined apron 30 to the upper strand of the endless felt 2, upon which it will be deposited in a thin even layer or film by means of the action of the regulating-roll 32 and the traveling motion of the felt. Upon this is deposited a suitable quantity offinely-divided. cement by the sieve 52. A compound layer of cement and pulp is thus formed on the felt 2, and as this passes over the suction-boxes 23 23, &c., a considerable quantity of the water or other liquid is sucked down through the felt and the layer of material on the felt is left in a sufiiciently-dry condition to adhere to the upper press-roll 9 as the felt passes through said press-rolls. This ress-roll is usually made of iron. A film 0 material is therefore wound upon the upper press-roll 9,

the same rising as the thickness of the Winding on its surface increases until a predetermined thickness is attained, when the cylindrical covering thus formed is slit longitudinally of the cylinder by a knife in the hands of the operator and removed in the'shape of a plate or sheet whose length isthe length of the cylinder and whose width is the circumference thereof. The felt from which the major porit the film of material.

The advantages of my invention comprise the practically complete saving of all waste of material, there being no opportunity for any of the cement or other substance to escape deposition upon the felt 2, the prolonged life of the felt'itself, which is not forced into destructive contact with the wirecloth roll used in former machines, and the ease of regulation of the raw materials and the machine and process at every point of operation, the possibility of cleaning and drying the felt, 1&0.

It is evident, of course, that various changes could be made in the relative arrangement and form of the parts of myinvention without departing from the spirit solve and set the dried cement the action of the suction-boxes may be modified or dis pensed with and, if desired, more water added to the pulp in the mixing-tank, or water may be sprinkled upon the layer of material I formed on the endless belt 2.

Having, therefore, described my invention, I claim- 1. In a machine for making millboard and similar substances, the combination of a pair of press-rolls, a flexible endless band passing through said rolls, means for depositing a fluid film of pulped fiber upon the upper section of said band and means for de ositing finelyzipulverized dry material on said film of pulpe fiber prior to its passage through the p'ress-rolls.

2. In a machine for making millboard an similar substances, the combination of a pair of press-rolls, a flexible endless band passing throu h said rolls, means for depositing a fluid m of ulped fiber upon the upper sec-' tion of said and and means for de ositing finelypulverized dry material on sai film of pulpe fiber prior to its passage through the press-rolls, together with a series of suctionboxes located under the. upper strand ofthe endless band and in operative relation thereto.

3. In a machine for making millboard and similar substances, the combination of a pair of press-rolls, a flexible endless band passing and and means for depositing press-rolls, said first-mentioned means comprising a mixing ta-nk, having a delivery-slot m'its side and an inclined apron extendingtherefrom to the endless band. 5 p 4. In a machine for making millboard and similar substances, the combination of a pair of press-rolls, a flexible endless band passing through said rolls, means for depositing a fluid of ulped fiber upon the upper s'ecro tion of said and and means ,for depositing finely-pulverized dry material onsaid film of v 1 pulped fiber prior to its passage throughthe press-rolls, -said first-mentioned means comprising a mixing-tank, having a delivery-slot '-15 in its side and an inclined apron extending therefrom to the endless band, and an agitator in said mixing-tank; v

' 5. Ina machine for-making millboard and similar substances, the combination of a pair 20 of press-rolls, a flexible endless band passing a throu h said rolls, means for depositing a fluid of ulped fiber upon the upper sec- "H011 of said and and means for depositing press-rolls. w

finelyulverized dry material on said film of pulpe fiber prior to its passage through the 25 press-rolls, said last-mentioned means comprising a sieve located'over the endless band and mechanism for agitating said sieve.

. 6. In a machine for making millboard and similar substances, the combination of a'pair 50 of press-rolls, a flexible endless'band passing said rolls, means fordeposlting a fluid m of ulped fiber upon the upper section of said band and means for de o'siting finely-pulverized dry material on sai film of 3 5 pulped fiber prior to its passage through the press-rolls, together with means for regulating the amount of water in the mixture on the endless band when the same reaches the Signed at Brooklyn,: New York, this 8th day of May, 1906.

' SILLMAN; Witnesses; f

CHAS. Ctznxow, E. N. Roman. 

